効率と有効性
効率は最小の資源で最大の結果を出すことを指しますが、有効性はその行動が目的をどれだけ達成するかを示します。
Efficiency and Effectiveness: What’s the Difference? (Similar yet Different #061)
Efficiency refers to achieving maximum results with minimum resources, while effectiveness refers to how well an action achieves its objectives.